Helical scan video tape recorder head start-up

摘要: A helical scan type video tape recorder, in which the wrap-around angle of magnetic around revolving drum is relatively large, provides fluctuations to motor start-up torque and reel for performing head with wrapped therearound when recorder operated stand-by mode. Fluctuations those are mutually synchronized opposite directions, whereby one stepped up increase torque, tension weakened, conversely decreased, strengthened, thereby assuring operations even adherence has occurred between drum.